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Mites in the environment of cases of Norwegian scabies
Abstract:
Three cases of Norwegian Scabies diagnosed in Glasgow hospitals within 1 year each caused wide-spread outbreaks of papular eruptions amongst the patients and staff, followed later by a few cases of classical scabies. Symptoms and timing suggested that these infections were caused by immature mites derived by personal contact and possibly by contact with infected cuticular fragments which were abundant in the environment of the three patients. To control a ward epidemic, isolation of the Norwegian scabietic should be followed by environmental and then by personal disinfestation.
Insights
Norwegian scabies outbreaks in hospitals highlight the risk of transmission from immature mites and environmental fragments. Effective control requires isolating infected individuals, followed by environmental and personal decontamination.
Area of Science:
- Dermatology
- Infectious Diseases
- Epidemiology
Background:
- Norwegian scabies, a hyper-infectious form of scabies, poses significant transmission risks in healthcare settings.
- Previous outbreaks have been linked to inadequate infection control measures.
Purpose of the Study:
- To investigate the transmission dynamics of Norwegian scabies in a hospital environment.
- To identify effective strategies for controlling ward-wide outbreaks.
Main Methods:
- Retrospective analysis of three Norwegian scabies cases and subsequent outbreaks in Glasgow hospitals.
- Clinical observation of symptom progression and transmission patterns.
- Environmental assessment for mite viability and transmission routes.
Main Results:
- Three cases of Norwegian scabies led to widespread papular eruptions among patients and staff.
- Transmission was attributed to immature mites via personal contact and contaminated environmental fragments.
- Classical scabies cases emerged following initial Norwegian scabies transmission.
Conclusions:
- Norwegian scabies outbreaks necessitate prompt and multi-faceted control strategies.
- Isolation of infected individuals, environmental disinfection, and personal decontamination are crucial for effective epidemic control.